Appveyor configuration and addition of badge

README.md

+Code status:
+------------
+
+* [![Travis CI status](https://secure.travis-ci.org/MariaDB/server.png?branch=10.2)](https://travis-ci.org/MariaDB/server) travis-ci.org (10.2 branch)
+* [![Appveyor CI status](https://ci.appveyor.com/api/projects/status/4u6pexmtpuf8jq66?svg=true)](https://ci.appveyor.com/project/rasmushoj/server) ci.appveyor.com
+
 ## MariaDB: drop-in replacement for MySQL
 
 MariaDB is designed as a drop-in replacement of MySQL(R) with more

appveyor.yml

@@ -3,7 +3,7 @@ version: build-{build}~branch-{branch}
 before_build:
   - md %APPVEYOR_BUILD_FOLDER%\win_build
   - cd %APPVEYOR_BUILD_FOLDER%\win_build
-  - cmake ..  -G "Visual Studio 15 2017 Win64" -DWITH_UNIT_TESTS=0
+  - cmake ..  -G "Visual Studio 15 2017 Win64" -DWITH_UNIT_TESTS=0 -DWITH_MARIABACKUP=0 -DMYSQL_MAINTAINER_MODE=ERR -DPLUGIN_ROCKSDB=NO -DPLUGIN_CONNECT=NO -DBISON_EXECUTABLE=C:\cygwin64\bin\bison
 
 build:
   project: win_build\MySQL.sln
@@ -16,6 +16,6 @@ platform: x64
 test_script:
   - set PATH=%PATH%;C:\Program Files (x86)\Windows Kits\10\Debuggers\x64
   - cd %APPVEYOR_BUILD_FOLDER%\win_build\mysql-test
-  - perl mysql-test-run.pl --force --max-test-fail=10 --parallel=auto --testcase-timeout=10 --skip-test-list=unstable-tests --suite=main,innodb,plugins,mariabackup
+  - perl mysql-test-run.pl --force --max-test-fail=10 --parallel=4 --testcase-timeout=10 --skip-test-list=unstable-tests --suite=main
 
 image: Visual Studio 2017